Diagnostic Software DVD
EN 52
5.
5.5.1
Nucleus 900: Digital Audio Loop
This nucleus tests the audio path through the digital board
Figure 5-9
5.5.2
Nucleus 901: Audio User Dealer Loop
This Nucleus is only possible in NAFTA sets.
A PCM audio sine of 12kHz is generated in the Host Decoder
for a while and sent to the analogue board. The signal coming
from the analogue board is encoded again and sent to the
memory of the host decoder for comparison. This nucleus tests
the components on the audio signal path:
•
Host decoder
•
Flex connection between connector 1602 (digital board)
and connector 1900 (analogue board)
•
DAC
•
Op-amp
•
Scart switch IC
•
ADC
•
Audio Encoder
•
VIP
•
VSM
Figure 5-10
5.5.3
Nucleus 902: Digital Video Loop
A colourbar generated in the host decoder is looped through
the VIP, Empire, and VSM and checked again in the host
decoder. The following components are tested on the video
signal path:
•
VIP
•
Empire
•
VSM
•
Host decoder
NUCLEUS 900: AUDIO LOOP DIGITAL
VIP
STI 5508
VSM
EMPRESS
DIGITAL BOARD
ANALOGUE BOARD
GND
VIP_ICLK: 27MHz
7500
7403
7200
7100
TR 01008_002
251102
NUCLEUS 901: AUDIO USER DEALER LOOP
VIP
STI 5508
VSM
EMPRESS
DIGITAL BOARD
ANALOGUE BOARD
ADC
connector
1900
connector
1602
VIP_ICLK:
27MHz
I2S
I2S
HEF4052
7501
connector
1911
connector
1942
FRONT AV BOARD
connector
connector
1900
1602
7500
7004
7403
7200
7100
DAC
CINCH OUT
7002
7001
CINCH IN
TR 05003_00
25110
Summary of Contents for LX9000R/22
Page 58: ...Diagnostic Software DVD EN 58 LX9000R 5 ...
Page 108: ...EN 108 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 109: ...EN 109 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 110: ...EN 110 7 LX9000R Circuit Diagrams and PWB Layouts DVIO BOARD top view ...
Page 111: ...EN 111 7 LX9000R Circuit Diagrams and PWB Layouts TEST POINTS OVERVIEW DVIO BOARD ...
Page 151: ...Circuit IC descriptions and list of abbreviations EN 151 LX9000R 9 Figure 9 11 ...
Page 152: ...Circuit IC descriptions and list of abbreviations EN 152 LX9000R 9 Figure 9 12 ...
Page 156: ...Circuit IC descriptions and list of abbreviations EN 156 LX9000R 9 IC7411 ...
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